Seed and seedling growth characteristics of Poa annua with ecological factors from different provenances
[Objective]To investigate the relationships between seed and seedling growth of annual bluegrass (Poa annua L.) with ecological factors from different provenances in order to provide fundamental data and a theo-retical basis for the collection of wild annual bluegrass germplasms and for the breeding of excellent varieties.[Method]Wild annual bluegrass seeds collected from nine regions were used as experimental materials to compare the seed quality and germination characteristics in different provenances. Their seed quality was comprehensively evaluated using a membership function method.[Result]The results showed that seed and seedling growth of annual bluegrass were significantly different among different provenances (P＜0.05). Seed length,width,germ length and seedling fresh weight were positively correlated with the longitude,mean annual temperature and frost-free period. The seed germination rate,potential and index,as well as thousand kernel weight were positively correlated with an-nual rainfall and altitude.The degree of impact on seed and germination by ecological factors was as follows:altitude＞annual rainfall＞longitude＞annual temperature＞frost-free period＞latitude. The comprehensive evaluation of the affiliation function exhibited that the quality order of the wild Annual bluegrass of the nine seed sources was ranked as:Ganzhou＞Huangzhong＞Pingan＞Yongchang＞Tianzhu＞Anning＞Yuzhong＞Liangzhou＞Qinzhou.[Conclusion]The seeds of annual bluegrass (Ganzhou) and annual bluegrass (Huangzhong) have the potential as ex-cellent germplasm for breeding of new annual bluegrass varieties.
万方数据
维普
